Modem



FIG. 1 is a left side elevational view of the modem;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a right side elevational view thereof. 

The ornamental design for a modem, as shown and described. 